engleski

Erosive effect of different beverages on composite materials

Background: flavored beverages (juices, sodas, teas) consumption has increased among schoolchildren. The most of them are acidic. Erosion is the chemical dissolution of tooth structure and restorative materials in acidic environment. There is a greater adhesion of bacteria on rougher surfaces. The aim of this study was to assess the erosion effect of the most commonly consumed beverages and to measure effect on the surface roughness of composite and giomer materials. Methods: the materials used in this study (Tetric EvoCeram-TEC (IvoclarVivadent), Filtek Ultimate-FU (3M ESPE) and Beautifil Flow PlusBFP (Shofu)) were immersed in different solutions continuously for 7 or 14 d. pH meter was used to measure the pH at 25°C: Coca-Cola (pH=2.4), iced tea (pH=3.5) and multivitamin soda (pH=3.4). A total of 60 samples were made - 20 from each material, divided into 4 groups and immersed in 4 solutions. Control group was stored in artificial saliva. Surface roughness parameters (Ra, Rp, Rz) were recorded at baseline, and at 7 and 14 d of exposure to beverages. Data were tested using analysis of variance and post-hoc test. Results: extremely low pH of Coca Cola caused a significant increase in surface roughness of all tested materials (FU: Rain- 0.224, Ra7d - 0.299, Ra14d - 0.367, (p<0.05)) . Citric acid from multivitamin soda appears to be more erosive to giomer than composite (BEF: Rain - 0.209, Ra7d - 0.235, Ra14d - 0.308, p<0.05). Longer exposure to acidic drink showed greater erosion (TEC in Cola: Rain- 0.183, Ra7d - 0.322, Ra14d - 0.397, p<0.05) . Conclusion: all tested beverages showed a significant erosive effect on tested restorative materials due to low pH related to acidic ingredients. Rough surfaces usually wear more quickly

composite ; surface roughness

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